Half-Squirrel, Half- is a uncommon Creature — Squirrel card from Unstable (UST), collector number 111. Current market price: $0.28 (foil $1.37), TCGplayer market prices via Scryfall.
Whenever a nontoken creature enters, Augment {G} ({G}, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)